See JDK-8375471 for the details. Basically if non-ascii vendor name is used the hotspot container tests fail on a fastdebug build due to an assert:

FAILED: containers/docker/DockerBasicTest.java

The failure trace is:
[COMMAND]
docker run --tty=true --rm jdk-internal:test-containers-docker-DockerBasicTest-basic /jdk/bin/java -XX:+ErrorFileToStderr -Djdk.test.docker.image.name=fedora -Djdk.test.docker.image.version=42 -version
[2026-01-20T10:00:03.748050003Z] Gathering output for process 13334
[ELAPSED: 2619 ms]
[STDERR]

[STDOUT]
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/disk/openjdk/upstream-sources/git/jdk-jdk/src/hotspot/share/runtime/perfData.cpp:439), pid=1, tid=7
# assert(strcmp(value, system_value) == 0) failed: property value mustn't differ from System.getProperty. Our value is: Foo bar \u00f6\u00dc\u00df, System.getProperty is: Foo bar \ufffd\ufffd\ufffd\ufffd\ufffd\ufffd
#
# JRE version: OpenJDK Runtime Environment (27.0) (fastdebug build 27-internal-adhoc.sgehwolf.jdk-jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 27-internal-adhoc.sgehwolf.jdk-jdk, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x1802438] PerfDataManager::assert_system_property(char const*, char const*, JavaThread*)+0x468
#
# Core dump will be written. Default location: Determined by the following: "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d %F" (alternatively, falling back to //core.1)
#
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/disk/openjdk/upstream-sources/git/jdk-jdk/src/hotspot/share/runtime/perfData.cpp:439), pid=1, tid=7
# assert(strcmp(value, system_value) == 0) failed: property value mustn't differ from System.getProperty. Our value is: Foo bar \u00f6\u00dc\u00df, System.getProperty is: Foo bar \ufffd\ufffd\ufffd\ufffd\ufffd\ufffd
#
# JRE version: OpenJDK Runtime Environment (27.0) (fastdebug build 27-internal-adhoc.sgehwolf.jdk-jdk)
# Java VM: OpenJDK 64-Bit Server VM (fastdebug 27-internal-adhoc.sgehwolf.jdk-jdk, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x1802438] PerfDataManager::assert_system_property(char const*, char const*, JavaThread*)+0x468
#
# Core dump will be written. Default location: Determined by the following: "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d %F" (alternatively, falling back to //core.1)
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

I'm attaching the jtr file.